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From: Oscar Salvador <osalvador@suse.de>
To: David Hildenbrand <david@redhat.com>
Cc: Ding Hui <dinghui@sangfor.com.cn>,
	akpm@linux-foundation.org, naoya.horiguchi@nec.com,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH v3] mm/page_alloc: fix counting of free pages after take off from buddy
Date: Wed, 26 May 2021 12:43:15 +0200
Message-ID: <20210526104315.GD1656@linux> (raw)
In-Reply-To: <301ec664-f153-7ed6-0231-8bbffb630a0d@redhat.com>

On Wed, May 26, 2021 at 09:58:15AM +0200, David Hildenbrand wrote:
> I guess if we'd actually be removing a page from the buddy while it's
> currently isolated by someone else (i.e., alloc_contig_range()), we might be
> in bigger trouble.
> 
> I think we should actually skip isolated pages completely.
> take_page_off_buddy() should not touch them.

That might be a problem indeed.
I will have a look at it.

Thanks

-- 
Oscar Salvador
SUSE L3

  reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-26  7:52 Ding Hui
2021-05-26  7:58 ` David Hildenbrand
2021-05-26 10:43   ` Oscar Salvador [this message]
2021-05-26 10:42 ` Oscar Salvador
2021-05-27  0:34 ` HORIGUCHI NAOYA(堀口 直也)

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